Sorry, I misunderstood who was asking for what!
Here's an under dash picture of Peanut's fuse block.
And a close up of the fuse block showing the red and wire wires plugged into the two sockets next to the battery fuse.
Looking at the wiring diagram for my 74 Argosy the red and white are not shown. From what I can determine the plugs are for coach builder add on's such as heater and A/C.
Here's my 74 diagram.
I think Herman will find that the white wire probably goes to either the heater/AC control. Not sure what the red wire would be to but it's bound to be some device added on by the coach builder.
Tonight after work I can try and trace the two wires down to see where they go.